[sourcekitd-test] When setting -fmodules-cache-path also set -fmodules #29437
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When doing header interface generation, we interpret clang command-line arguments in `initInvocationByClangArguments` and attempt to setup a matching Swift compiler invocation. One important argument is the module cache, but clang will only interpret `-fmodules-cache-path` if modules are enabled (typically with `-fmodules`). While the header itself might not need modules, Swift will import its own shims module and during testing this needs to honour lit's provided cache. So we add -fmodules in sourcekitd-test anytime we add -fmodules-cache-path. rdar://58836540
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@swift-ci please test |
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This is a follow-on to #29357 to make the -fmodules-cache-path part actually work. |
nathawes
approved these changes
Jan 24, 2020
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When doing header interface generation, we interpret clang command-line
arguments in
initInvocationByClangArgumentsand attempt to setup amatching Swift compiler invocation. One important argument is the module
cache, but clang will only interpret
-fmodules-cache-pathif modulesare enabled (typically with
-fmodules). While the header itself mightnot need modules, Swift will import its own shims module and during
testing this needs to honour lit's provided cache. So we add -fmodules
in sourcekitd-test anytime we add -fmodules-cache-path.
rdar://58836540